Tool



C. H. ViOL TOOL Filed Jan. 21, 1922 Patented Jan. 6, 1925.

PATE NT Y'0 F FIC E CHAR-LES HERMAN' VIOL, OE PITTSBURGH, PENNSYLVANIA,ASSIGNOR TO STANDARD CHEMICAL COMPANY,`- 0F PITTSBURGH, PENNSYLVANIA.

TOOL.

l Application ledanna'ry 21,51922. Serial' Nol 530,921.

T all whom t may Concern.'

Be it known that I, CHARLns H. Viol., a citizen of the United States,and a resident of Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inTools; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to improvements in tools and more particularly tosuch as are especially adaptable for use in manipulating twopart metalscreens in which tubes containing radium salts or compounds arecontained.

It is important in the handling of radium tubes that the operator shallnot be compelled to apply his fingers directly to the tubes. The tubecontaining the radium salt or compound is placed in a metal screen madein two parts screwed together, said parts comprising a tubular bodyportion and a cap having threaded connection therewith. The cap portionof the screen is made with an eye at one end, and it is an object of myinvention to provide a tool which can be manipulated with one hand andcaused to have locked connection with the eye of the screen cap andturned bodily to rotate the screen cap to screw it to or unscrew it fromthe body portion of the screen while said body portion is being held bya suitable tool of the forceps type.

vWith this and other objects in view, the invention consists in certainnovel features of construction and combinations of parts as hereinafterset forth and pointed out in the claim.

In the accompanying drawings, Figure l is a perspective view of myimproved tool with the arms in their open or separated positions. Figure2 is a view showing the tool in closed position as when in use, andFigures 3 and l are sectional views showing details of construction.

Wy improved tool comprises two spring arms 1 and 2 having their rear endportions united, as at 3, and formed to provide a handle ll. The springarms 1 and 2 taper from their intermediate portions toward their freeends and the arm 2 may be roughened or serrated as at 5 to preventslipping of the users lingers. The free end of the arm 1 is providedwith a pointedV pin G projecting toward the arm 2 and the latter is madewith a hole 7 to receive said pin. The perforated free end portion ofthe arm 2 is recessed as at 8 for the accommodation of the eye on thecap member of a radium tube screen.

A slide 9 is mounted on the arm 1 and is guided by a pin 10 and a screw11 projecting from said arm and entering an elongated slot 12 in saidslide. Atv its forward end, the slide 9 is provided with curved jaws 13adapted, when the slide is moved rearwardly to engage the taperingportion of the arm 2 and serve to lock the arms 1 and 2 together asindicated in Figs. 2 and 3 and thus prevent possibility of accidentaldisengagement of the tool from the eye of the screen cap. To facilitatemanipulation of the locking slide, the latter is provided near its rearend with a serrated button or enlargement 14.

In using the device, the operator will cause the arms 1 and 2 toapproach each other so that the pin 6 will pass through the eye of ascreen cap and through the hole 7 near the free end of the arm 2,-thebody portion of the screen being held by the operator with a suitabletool of the forceps type. After the tool shall have been conn nectedwith the screen cap as above eX- plained, the operator will move thelocking slide rearwardly so that its jaws will grasp the side portionsof the arm 2 where the taper of said arm is such as to cause the curvedjaws to partially embrace the same. The operator will now turn or rotatethe tool on its own axis and thus cause the screen cap to rotate and tobe screwed onto or from the body portion of the screen. By moving thelocking bar forwardly so that the jaws thereof will become disposed at apart of thel tapering arm 2 which has less diameter than the spacebetween said jaws, the arms will be released, one from the other, andtheir resilience will cause them to spring apartand become released fromthe eye of the screen cap.

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is:

A tool for manipulating the cap of a radium screen, comprising tworesilient arms united at one end and each tapering` toward its free end,one of the arms having a hole near its free end and a recess in itsinner side immediately adjacent said hole forming a seat for the eye ofa screen cap, and the other arm terminating in a lateral pin adapted topass through the eye of a screen cap andenter the hole in thefirstmentioned arm, a slide mounted on one arm and having a longitudinalslot between its ends', members passing through said slot and carried bythe arm to guide 'the slide and hold it to the arm,y and jaws carried bythe slide and adapted to embrace both arms to look them together, theends of the jaws being` free whereby to release the arms when movedtoward the free ends of the arms.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

CHARLES HERMAN VIOL.

l/Vitnesses:

RUTH M. SEAMAN, PAUL F. HAGUE.

